Without knowing more, it's certainly possible that the NSA wiretap which snared Harman was proper (as reported it was court-approved, though whether that means precisely what it should isn't necessarily the case in FISA/illegal wiretapping land) by the standards of such things. But what obviously isn't proper is the suggestion that in exchange for dropping the investigation, Harman became a cheerleader for Bush's illegal wiretapping program. I bring up the Joe Klein character because Klein was a defender and conduit of misinformation for FISA-reated stuff. And Klein's close to Harman...
...update/correction here.